Marein has the neuroprotective effect due to a reduction of damage to mitochondria function and activation of the AMPK signal pathway . Marein improves insulin resistance induced by high glucose in HepG2 cells through CaMKK/AMPK/GLUT1 to promote glucose uptake, through IRS/Akt/GSK-3β to increase glycogen synthesis, and through Akt/FoxO1 to decrease gluconeogenesis. Marein is a HDAC inhibitor with an IC 50 of 100 μM. Marein has beneficial antioxidative, antihypertensive, antihyperlipidemic and antidiabetic effects.